A seller in Wallonia mainly pays for the mandatory certificates (EPC and electrical compliance), a possible mortgage release, and the agency commission. The big transfer taxes (registration duties, notary purchase fees) fall on the buyer, not the seller (Notaire.be, 2026).
The pleasant surprise for most Walloon sellers is how light their side of the bill is. The heavy costs people associate with property, registration duties of 12.5% and the notary’s purchase honoraria, are legally the buyer’s responsibility, not yours (Notaire.be, 2026). What you carry as a seller is a shorter, more predictable list built around getting the property legally ready to change hands.
First come the compulsory certificates. Every sale needs a valid EPC (PEB), which costs roughly 150 to 400 euros in Wallonia and lasts 10 years (ImmoAnalyse, 2026). An electrical compliance certificate (CE) is also required for any home with a fixed installation, typically around 100 to 170 euros (Belgian inspection bodies, 2026). Depending on the property you may also need a fuel-oil tank attestation or a soil report. These documents are the seller’s duty because the buyer is entitled to know exactly what they are acquiring.
Second, if a mortgage still encumbers the property, you will pay for its release (mainlevee) at the deed. This is usually close to 1% of the original loan, commonly 1,500 to 2,500 euros for a mid-sized credit (Estimer Logement, 2026). A counter-intuitive point: even a fully repaid loan needs a formal release before you can sell, because the mortgage inscription stays on the register for 30 years unless lifted.
Third is the agency commission, freely agreed with your estate agent and generally a percentage of the sale price. Reassuringly, this commission and your certificate costs are deductible from any taxable capital gain, and for your main residence there is usually no capital-gains tax at all (Notaire.be, 2026). Small extras can include syndic documents for an apartment and the pro-rata share of the property tax you settle with the buyer at the deed date.
At a glance
- EPC (PEB) certificate: about 150 to 400 euros, valid 10 years (ImmoAnalyse, 2026).
- Electrical compliance certificate (CE): about 100 to 170 euros (Belgian inspection bodies, 2026).
- Mortgage release (mainlevee), if applicable: roughly 1% of the original loan, often 1,500 to 2,500 euros (Estimer Logement, 2026).
- Agency commission: a freely agreed percentage of the sale price.
- Optional extras: fuel-oil tank attestation, soil report, syndic documents for a flat.
- Property tax (precompte immobilier): your pro-rata share up to the deed date (Notaire.be, 2026).
- Not the seller: registration duties and the notary purchase fees are paid by the buyer.